Question
Oliver paid $82 for 11 notebooks and 4 pens. The total cost of a notebook and a pen was $10. Diana bought 5 notebooks and 2 pens. How much did she pay for these items?
4 m

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Oliver paid $82 for 11 notebooks and 4 pens. The total cost of a notebook and a pen was $10. Diana bought 5 notebooks and 2 pens. How much did she pay for these items?